DE3677473D1 - Phasenumtastmodulator 22n-qam und, insbesondere 4-psk-modulator. - Google Patents
Phasenumtastmodulator 22n-qam und, insbesondere 4-psk-modulator.Info
- Publication number
- DE3677473D1 DE3677473D1 DE8686460017T DE3677473T DE3677473D1 DE 3677473 D1 DE3677473 D1 DE 3677473D1 DE 8686460017 T DE8686460017 T DE 8686460017T DE 3677473 T DE3677473 T DE 3677473T DE 3677473 D1 DE3677473 D1 DE 3677473D1
- Authority
- DE
- Germany
- Prior art keywords
- modulator
- qam
- phase shift
- psk
- psk modulator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/20—Modulator circuits; Transmitter circuits
- H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
- H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
- H04L27/2057—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases with a separate carrier for each phase state
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/36—Modulator circuits; Transmitter circuits
- H04L27/362—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8516088A FR2589298B1 (fr) | 1985-10-28 | 1985-10-28 | Modulateur par deplacement de phase maq 22n et, en particulier, modulateur mdp4 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3677473D1 true DE3677473D1 (de) | 1991-03-14 |
Family
ID=9324336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8686460017T Expired - Lifetime DE3677473D1 (de) | 1985-10-28 | 1986-09-12 | Phasenumtastmodulator 22n-qam und, insbesondere 4-psk-modulator. |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0225269B1 (de) |
DE (1) | DE3677473D1 (de) |
FR (1) | FR2589298B1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2622376B1 (fr) * | 1987-10-21 | 1990-01-26 | Verdot Georges | Modulateur par deplacement de phase a quatre etats, notamment pour modulation d'amplitude a deux porteuses en quadrature a grand nombre d'etats |
JP2001041117A (ja) * | 1999-07-27 | 2001-02-13 | Ngk Insulators Ltd | 液滴噴霧装置及びその製造方法 |
US10378296B2 (en) | 2014-10-23 | 2019-08-13 | Halliburton Energy Services, Inc. | Sealed downhole equipment and method for fabricating the equipment |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2048057C1 (de) * | 1970-09-30 | 1977-11-10 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Verfahren zur Erzeugung einer phasensprungmodulierten elektrischen Schwingung |
JPS5125303B1 (de) * | 1971-02-10 | 1976-07-30 | ||
US4206423A (en) * | 1978-10-03 | 1980-06-03 | Rca Corporation | Digitized phase modulating means |
FR2469062B1 (fr) * | 1979-10-31 | 1987-05-07 | Bailly Roland | Modulateur par deplacement de phase a quatre etats |
FR2472876A1 (fr) * | 1979-12-31 | 1981-07-03 | Bic Jean Claude | Modulateur-demodulateur pour transmission en double modulation d'amplitude a quatre niveaux sur porteuses en quadrature |
-
1985
- 1985-10-28 FR FR8516088A patent/FR2589298B1/fr not_active Expired
-
1986
- 1986-09-12 DE DE8686460017T patent/DE3677473D1/de not_active Expired - Lifetime
- 1986-09-12 EP EP19860460017 patent/EP0225269B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0225269A1 (de) | 1987-06-10 |
FR2589298A1 (fr) | 1987-04-30 |
FR2589298B1 (fr) | 1987-11-20 |
EP0225269B1 (de) | 1991-02-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8330 | Complete disclaimer |